New Technology and Current Understanding of Episcleral Venous Pressure

To understand the current and new technology surrounding episcleral venous pressure (EVP). Episcleral venous pressure plays a vital role in calculating intraocular pressure based on the formula IOP = (Q − U)/c + EVP where Q is the aqueous flow rate, U is the pressure-insensitive uveoscleral outflow rate, c is the outflow facility, and EVP is episcleral venous pressure. Various methods for measuring EVP, including direct, indirect, and non-invasive methods, have been explored. These methods have great variability, with findings ranging between 5.1 and 11.4 mmHg. The effect of various medications on EVP has also been examined, and newer medications that aim to lower EVP are being developed. Future studies and techniques are needed to develop more reliable and accurate measurements of EVP. With these improved diagnostics, we will be able to identify an individual’s EVP, which will allow for targeted therapy with medications or surgery.